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Can someone give me the formula to work this out, I am not sure.
Find the value of t for the difference between two means based on an assumption of normality and this information about two samples. (Use sample 1 - sample 2. Give your answer correct to two decimal places.)

Sample Number Mean Std. Dev.
1 25 38.6 13.7
2 29 42.1 10.2

  • math -

    t = -1.07

  • math -

    this is not right can you explain how to get the right answer by working it out. there is a few of us working together and we all have different problems so it helps to see it worked out.

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